Nightline: Convict's Letter Reopens Murder Case

A U S T I N, Texas, Jan. 15 -- When two men were convicted and sentenced to life in prison for the murder of 20-year-old Nancy DePriest, her mother Jeanette Popp took comfort that justice had been done.

But another man, Josef Marino says he is responsible for the attack on DePriest. "I'm the sole perpetrator. I'm the one who robbed her. I'm the one that raped her. I'm the one who murdered her," he says.